docs: def show_content(context, page, content_type, lang=None, fallback=True):
      """Display a content type from a page.
  
      Example::
  
          {% show_content page_object "title" %}
  
      You can also use the slug of a page::
  
          {% show_content "my-page-slug" "title" %}
  
      Or even the id of a page::
  
          {% show_content 10 "title" %}
  
      :param page: the page object, slug or id
      :param content_type: content_type used by a placeholder
      :param lang: the wanted language
          (default None, use the request object to know)
      :param fallback: use fallback content from other language
      """
      return {'content': _get_content(
          context, page, content_type, lang, fallback)
      }